Struct LayerTable 

pub struct LayerTable {
    pub table_version: u32,
    pub layer_count: u32,
    pub entry_size: u32,
    pub entry_count: u32,
    pub entries: Vec<LayerEntry>,
    /* private fields */
}

The LTBL chunk.

Fields

table_version: u32

Layout version. 1 for this specification.

layer_count: u32

Layers the table describes, which must equal HEAD.total_layers.

entry_size: u32

Bytes per entry; readers stride by this and skip unknown trailing fields.

entry_count: u32

Entries in the table.

entries: Vec<LayerEntry>

Every entry, in table order.

Implementations

impl LayerTable

pub fn parse(payload: &[u8]) -> Result<LayerTable>

Parse the chunk payload.

pub fn new(entries: Vec<LayerEntry>, layer_count: u32) -> Result<LayerTable>

Build a table over entries, which must account for layer_count layers exactly as LayerTable::parse requires of a file.

pub fn to_bytes(&self) -> Vec<u8>

Serialize the chunk payload at the v1 entry size.

pub fn layer_entries(&self, layer: u32) -> &[LayerEntry]

The entries of layer layer, its first entry included.

Empty when the table describes no such layer.

pub fn first_entry(&self, layer: u32) -> Option<&LayerEntry>

The first entry of layer layer, which is sector 0’s.

pub fn entry(&self, layer: u32, sector_id: u32) -> Option<&LayerEntry>

The entry for (layer, sector_id).

pub fn is_multi_sector(&self) -> bool

Whether some layer carries more than one sector with data.

A layer carries a sector when its entry for it holds bytes, so an entry that exists only to point at an LROV chunk does not make a file multi-sector. This is what the MULTI_SECTOR header flag asserts.

Trait Implementations

impl Clone for LayerTable

fn clone(&self) -> LayerTable

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for LayerTable

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Eq for LayerTable

impl PartialEq for LayerTable

fn eq(&self, other: &LayerTable) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for LayerTable